Yes but looking good comes with having a great personality or being funny etc. Rita is none of those things, her stint in x-factor was fine but I couldn't help but think "why would they take your advice you're still on your first album".
Bottom line is what you can't deliver in talent you have to give in other ways both to the public and the record producers.
If you have a hit album, doesn't that make you qualified for the X factor? There are artists out there who don't look good and aren't charming enough to win people over. They just have a good PR team. With Rita in interviews she does come across as being funny and very "girl next door"